ISO INTERNATIONAL STANDARD 657-2 First edition 1989-08-01 Hot-rolled steel sections Part 2 : Unequal-leg angles Dimensions Profilésenacierlaminésachaud- Partie 2: Cornieres a ailes inegales - Dimensions Reference number ISO 657-2 : 1989 (E) No reproduction or networking permitted without license from IHS Not for Resale ISO 657-2 : 1989 (E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (iSO member bodies). The work of preparing International Standards isnormally carriedout throughisOtechnical committees.Eachmember bodyinterested ina subjectforwhichatechnical committeehasbeenestablishedhas the right to be represented on that committee.International organizations,govern mental and non-governmental, in liaison with Iso, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on all mattersof electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISO procedures requiring at International Standard ISO 657-2 was prepared by Technical Committee ISO/TC 17, Steel. It cancels and replaces ISo Recommendation R 657-2 : 1968, of which it constitutes a technical revision. Iso 657 consists of the following parts, under the general title Hot-rolled steel sections: Part 1: Equal-leg angles - Dimensions Part 2: Unequal-leg angles - Dimensions Part 5: Equal-leg angles and unequal-leg angles -- Tolerances for metric and inch series Part 6: Parallel flange sections (metric series)-Dimensions Part 10: Parallel flange sections - Tolerances Part 11: Sloping flange channel sections (metric series) - Dimensions and sectionalproperties Part 13: Tolerances on sloping flange beam, column and channel sections Part 15:Sloping flangebeam sections (metric series)-- Dimensions and sec tionalproperties Part 16: Sloping flange column sections (metric series)-Dimensions and sec- tionalproperties Part 18:L sections for shipbuilding (metric series)-Dimensions, sectional propertiesandtolerances Part 19: Bulb flats (metric series) - Dimensions, sectional properties and tolerances Part20:Parallelflangechannelsections-Dimensions Part21:T-sectionswithequaldepthandflangewidth-Dimensions ISO1989 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher./Droits de reproduction reserves. Aucune partie de cette publication ne peut étre reproduite ni utilisée sous quelque forme que ce soit et par aucun procede,électroni- que ou mecanique, y compris la photocopie et les microfilms, sans I'accord écrit de I'éditeur. International OrganizationforStandardization Casepostale56.CH-1211Geneve20.Switzerland Printed in Switzerland/Imprime en Suisse No reproduction or networking permitted without license from IHS Not for Resale ISO 657-2 : 1989 (E) INTERNATIONALSTANDARD Hot-rolled steel sections Part 2 : Unequal-leg angles - Dimensions Scope 3Dimensions This part of ISO 657 specifies dimensions of hot-rolled unequal- 3.1 The dimensions of unequal-leg angles are given in leg angles. table 1. Preferred dimensions are given in bold type. 3.2 The root radi given in table 1 are for information only Normative reference 3.3 The toe radius has not been specified and may, if con- sidered necessary, be determined independently for national The following standard contains provisions which, through standards. reference in this text, constitute provisions of this part of ISo 657. At the time of publication, the edition indicated was 4 Sectional properties valid. All standards are subject to revision,and parties to agreements based on this part of ISo 657 are encouraged to The mass, sectional area and sectional pro